Manganese-shadlunite Mineral Data

Manganese-shadlunite Mineral Data +

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General Manganese-shadlunite Information

Chemical Formula:

(Mn,Pb)(Cu,Fe)8S8

Composition:

Molecular Weight = 842.50 gm

Manganese 4.89 % Mn

Iron 13.26 % Fe

Copper 45.26 % Cu

Lead 6.15 % Pb

Sulfur 30.45 % S

______

100.00 %

Empirical Formula:

Mn²⁺_0.75Pb_0.25Cu₆Fe²⁺₂S₈

Environment:

In Cu-Ni ores.

IMA Status:

Approved IMA 1990

Locality:

Oktyaber and Mayak mines, Talnakh area, Noril'sk region, western Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Tatyana Shadlun, Russian ore mineralogist.

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Manganese-shadlunite Crystallography

Cell Dimensions:

a = 10.73, Z = 4; V = 1,235.38 Den(Calc)= 4.53

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.23(1), 1.894(0.9), 1.097(0.4),

Physical Properties of Manganese-shadlunite

Color:

Yellow.

Density:

4.44

Diaphaniety:

Opaque

Hardness:

4 - Fluorite

Luster:

Metallic

Optical Properties of Manganese-shadlunite

RL Anisotrophism:

Weak.

RL Color:

Grayish yellow, darker than cubanite.

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Manganese-shadlunite in Air**
λ	R	∑ R(λ)
440 nm	21.20
460 nm	22.70
480 nm	24.70
500 nm	26.50
520 nm	27.90
540 nm	29.00
560 nm	29.90
580 nm	30.80
600 nm	31.20
620 nm	32.30
640 nm	32.90
660 nm	33.80
680 nm	34.50
700 nm	34.60

**Calculated Relative Intensity Colors of Manganese-shadlunite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	380%
R

Calculated Properties of Manganese-shadlunite

Electron Density:

r_electron=4.23 gm/cc
note: r_{Manganese-shadlunite}=4.53 gm/cc.

Fermion Index

Fermion Index = 0.01868
Boson Index = 0.98132

Photoelectric:

PE_{Manganese-shadlunite}= 128.59 barns/electron
U=PE_{Manganese-shadlunite} x r_electron= 543.81 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manganese-shadlunite is Not Radioactive

Manganese-shadlunite Classification

Dana Class:

2.7.1.5 (2)Sulfides - Including Selenides and Tellurides

(2.7)where Am Bn Xp, with (m+n):p=9:8

(2.7.1)Pentalndite Group (Isometric: Fm3m)

2.7.1.1 Pentlandite (Fe,Ni)9S8 F m3m 4/m 3 2/m

2.7.1.2 Argentopentlandite Ag(Fe,Ni)8S8 F m3m 4/m 3 2/m

2.7.1.3 Cobaltpentlandite Co9S8 F m3m 4/m 3 2/m

2.7.1.4 Shadlunite (Pb,Cd)(Fe,Cu)8S8 F m3m 4/m 3 2/m

2.7.1.5 Manganese-shadlunite (Mn,Pb)(Cu,Fe)8S8 F m3m 4/m 3 2/m

2.7.1.6 Geffroyite (Ag,Cu,Fe)9(Se,S)8 F m3m 4/m 3 2/m

Strunz Class:

II/B.16-50 II - Sulfides and sulphosalts

II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Sulfides with predominant Nickel, Cobalt, Rhodium and Palladium

II/B.16 - Pentlandite group

II/B.16-10 Pentlandite (Fe,Ni)9S8 F m3m 4/m 3 2/m

II/B.16-20 Cobaltpentlandite Co9S8 F m3m 4/m 3 2/m

II/B.16-30 Argentopentlandite Ag(Fe,Ni)8S8 F m3m 4/m 3 2/m

II/B.16-40 Geffroyite (Ag,Cu,Fe)9(Se,S)8 F m3m 4/m 3 2/m

II/B.16-50 Manganese-shadlunite (Mn,Pb)(Cu,Fe)8S8 F m3m 4/m 3 2/m

II/B.16-60 Shadlunite (Pb,Cd)(Fe,Cu)8S8 F m3m 4/m 3 2/m

II/B.16-70 Palladseite Pd17Se15 P m3m 4/m 3 2/m

II/B.16-80 Miassite! Rh17S15 P m3m 4/m 3 2/m

II/B.16-80* Prassoite! Rh17S15(?) P m3m 4/m 3 2/m

Other Manganese-shadlunite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Manganese-shadlunite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Manganese-shadlunite

(Mn,Pb)(Cu,Fe)8S8
Dana No: 2.7.1.5 Strunz No: II/B.16-50
Locality:

Notes: